Research of the Backfill Body Compaction Ratio Based on Upward Backfill Safety Mining of the Close-Distance Coal Seam Group

Table 3

Numerical simulation scs.

Test number	Mining height (m)	BBCR (%)
I-1–I-7	11.41	0; 40; 60; 70; 75; 80; 85
II-1–II-5	3; 5; 7; 9; 11	80